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Nathan
Nathan, Engineer
Category: Printers
Satisfied Customers: 24474
Experience:  Computer networking/repair. 20+ years experience printer repair
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Canon MG7550 Printer. Prints in colour OK but won't print a

Resolved Question:

Canon MG7550 Printer. Prints in colour OK but won't print a simple text document in black and white. If I change the text to a colour ( eg dark charcoal) it prints ok. Have recently done a deep clean on the print nozzles and replaced all six cartridges in an attempt to cure the problem.
Submitted: 11 months ago.
Category: Printers
Expert:  Nathan replied 11 months ago.

Hello, I’m Nathan, and I’ll be assisting you today. Sorry to hear that you’re having trouble with this but I’ll do my best to help you out.

These symptoms point to either a clogged/contaminated print head, or a faulty print head (or the logic board that controls it).

It is normal for the black nozzles to fail first because they get the most use.

You can try going into the setup/maintenance menu on the machine and running the “clean print head” function repeatedly, up to 5 times total, testing after each.

If it still doesn’t print anything, you’ll need to do a manual cleaning as a next step.

I have to caution you up front though that the manual cleaning process is messy and time consuming. It also has a low chance of success, if you see no improvement at all from the automated cleaning. It is most likely a hardware failure (bad head) which the cleaning can’t fix, as printheads are a wear item and do fail with time/use.

Realistically, it’s probably time for a new printer. As this is a 2014 model printer, it is well into its designed maximum 3 year service life, so this type of failure is not surprising. While it can be fixed, it is not worthwhile to do so. You would have to, at a minimum, replace the printhead, which costs about $85; if the logic board is bad you’re looking at $200-250. For $80-100 you can replace the entire machine with a brand new model, with current technology and a fresh warranty, which makes more sense than buying the new part for an older printer.

That said, it doesn’t hurt to try, if you wish. Let me know how the built in cleaning function works, and I’ll guide you through the manual steps next, or I can recommend replacement options if you prefer.

Best regards, ***** ***** for the news,

Nathan

Customer: replied 11 months ago.
OK. I'll try the cleaning process a few times. If this doesn't work, I don't think I'll bother with the manual cleaning process. Although an oldish model it hasn't had much use, so it would be very disappointing to have to get another printer. I'll let you know how the auto cleaning process works.Best regards,
David
Expert:  Nathan replied 11 months ago.

I understand your frustration with it, David. Infrequent use is actually more detrimental to these printers than regular use. If they sit idle for any amount of time the nozzles quickly clog up, then when you try to print they subsequently fire dry and overheat, leading to permanent damage.

If looking for a replacement, I’d recommend any of the Epson workforce series printers. They tend to be very reliable, are easy to set up and use, have good print quality, and reasonably priced ink. Example: http://amzn.to/1nxc4II or http://amzn.to/1nxc8Z5

Note that these, like all consumer grade inkjet printers, are designed to be low cost and are essentially disposable after a few years, subsidized by the high cost of ink cartridges. If you wish to have a better quality and longer lasting printer, that comes with years worth of ink up front, consider the Epson ecotank models instead: http://amzn.to/1nxcejv

Alternately, for a more business/commercial grade product that will be rated for a 5 year life, consider a laser printer. Lasers cost more up front also, but a toner cartridge can last for thousands of pages. A black only all in one laser is around $125: http://amzn.to/1nxcpv2

while a color model is about twice that: http://amzn.to/1nxcnn0

Nathan and 4 other Printers Specialists are ready to help you
Customer: replied 11 months ago.
Hi Nathan,
Your suggestion re repeated cleaning has had a positive response. After the 3rd clean I began to get a readable but poor quality print out. After the 6th the quality is almost acceptable - a tiny bit of fading here and there. I'll try another deep clean tomorrow. I think your job is done and thanks for the links to other printers. I'll give you a 5 start rating.Best regards,
David